Post it here. Also a small heads up, most of the more experienced heads on the forums don't usually respond well to the "ideas guy" persona. Why not give it a go yourself, there's dozens of tutorials out there, why not take a stab at it?

Provided the permission is given from the legal owner of the 3D model, there should be no issues. However, you've mentioned that it is from another game, and in a lot of cases, 3D models used in other games belong to the Company not the artist. Best checking up on that, however I can't foresee any issues. I recommend asking the folks on the Arma 3 Discord (IP Rights Violations Channel).
-Flinty

After a bit of gentle prodding from a friend, I've decided to start posting some content here again. For now, here's some of my twitter stuff;
Carrier Strike Group 14 - Morning Sortie
Remember to take a buddy when heading out on those early morning patrols!
Mods;